Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Note: Write Regular Expressions for all of the languages given below defined over Alphabet Set E= {a,b} Language of all words in which a's appears tripled. It means that every chunk of a's contains 3 a's, 6 a's etc. RE = [b*(aa)b] %3D Language of all words that contain exactly 2 b's or 3 b's but not more than that. RE= (a*ba*bat) + (a*ba*ba*ba*)
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Transcribed Image Text:Note: Write Regular Expressions for all of the languages given below defined over Alphabet Set E= {a,b} Language of all words in which a's appears tripled. It means that every chunk of a's contains 3 a's, 6 a's etc. RE = [b*(aa)b] %3D Language of all words that contain exactly 2 b's or 3 b's but not more than that. RE= (a*ba*bat) + (a*ba*ba*ba*)
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